Burning pulverized fuel.



V. Z. CARACRISTI.

BURNING PULVERIZED FUEL.

APPLICATlON FILED NOV-5.1913.

1,274,384. I Patented Aug. 6, 1918.

2 SHEETS-SHEET I.

INVENTOR 4am; A

V. Z. CARACRISTI.

BURNING PULVERIZED FUEL- APPLICATION FILED NOV-5.'19I3.

2 SHEETS-SHEET 2.

Patented Aug. 6, 1918.

vmemrus Z. CCBISTI, OF NEW YORK, ABBIGNOR "IO LOGOMOTIVE FULVEMZED FUEL'COEIJPANY, A CORPORATION OF DELAWARE. 4

BG PULL W h I eas es.

speoiflcation of Letters Patent.

FUEL.

To all whom it may concern.-

Be it known that I, Vmemrus Z. GARA- ciusrr, of Albany, in the county of Albany and State of New York, have invented a certain new and useful Improvement in Burning Pulverized Fuel, of which improvement the following is a s ecification.

My invention, w ile relating more particularly to burning combustible matter in a comminuted or finely pulverized state, in the fireboxes of steam boilers, is also applicablefor use with gaseous or ii uid fuels, and in connection wlth heating rnaces of other descriptions, and its ob ect is to enable the combustion of fuel of such character to be thoroughly and efi'ectively carried on; the sheets of the firebox to be protected from the direct action of flame of extremely high tem-.

peratures; and the separation and removal of incombustible residuum to be continuously efi'ected.

To this end, 'my invention, generally stated, consists in the combination, with a furnace, of a pluralit of fuel delivery conduits, the outlets 0 which dischar e toward a substantially central locus 0 combustion, and a baflie plate or deflector suported above the lane toward which the odies of fuel dellvered from the several conduits are directed and in which they tend to meet one another.

The improvement claimed is hereinafter fully set forth.

In the accompanyin drawings: Figure 1 is a vertical longitu inal central section through a locomotive boiler firebox, illustrating one form of means for the practice of my invention; Fig. 2, a transverse section through the same, on the line a a of Fig, 1; and, Fig. 3, a hdrizontal section, on the line b b of Fig. 1. My invention is herein exemplified as applied in connection with a locomotive firebox which is of the present standard medium width type, the inside firebox comprising a crown sheet, 1, flue sheet, 2, door sheet, 3, and side sheets, 4, and the outside firebox, a roof or wrapper sheet, 1", throat sheet, 2, back sheet, 3, and side sheets, 4. The water spaces between the inside and outside fireboxesare closed at bottom by a mud ring, 5, in the usual manner, and a plurality'of fire tubes, 6, extend through the shell .or waist,

7 of the boiler, to the smoke box, which is not shown.

which are used for burnin In the practice of my invention, I provide, a

at the bottom of the firebox, a floor, 8, 'of fire brick or other suitable refractory matonal, the ordinary grates and ash tpan solid fuel not being necessary or applica le. The floor, which is preferably as shown, downwardly and rearwardly inc ined, may be located at any desired level, relatively to the bottom Patented Aug. 6, 1918..

inc ined, from its sides to its middle portion, as shown in Fig. 2, in order to facilitate the discharge of incombustible residuum;

Bodies or columns of pulverized fuel are delivered to the inside firebox, either by being forced thereinto, by a fan or pressure blower, 'or by being drawn thereinto by induced draft, through a plurality of conduits, 9,'two or more ofwwhich may be applied, and three being shown in the present instance. The several conduits, 9, are adapted for the introduction of air withthe fuel, and are so relatively inclined as to discharge the combustible mixture of fuel and air which passes through them, in the direction of which may be descriptively termed a locus of combustion, which is substantially in the center of the space within the firebox, and which is indicated by the reference symbol m, in Fig. 1 of the drawings. Its position may, however, be changed by variations in the relative velocity of the columns of mingled fuel and air delivered through different conduits. The combustible mixture delivered from the conduits is ignited and burns ,atand near the locus of combustion. Openings for the ingress of air are formed around the conduits, 9, as shown at the front of the firebox in Fig. 1

A baflle plate or deflector, 10, of fire brick or other suitable refractory material, extends across the fire-box, in a. plane above the locusof combustion, being supported either on arch tubes, 10, as shown, or on studs in the side sheets in the manner of the brick arches ordinarily applied in present practice. The bafile plate is substantially horizontal in any longitudinal plane, ex-

plate is to prevent a blow, pipe or intense concentrated heat action of the gaseous products evolved from the fuel at the locus of combustion, on the firebox sheets, stay bolts, and rivets, and to deflect these productsrearwardly and upwardlybefore they pass to the flues, as well as to deflect the incombustible residuum (ash and impurities) .of the fuel toward the floor of the firebox.

a blower or other pressure device.

The bafile plate further serves, by becoming highly heated, as a -regenerator, which tends to maintain a substantially constant temperature at the locus of combustion during momentary interruptions of the fuel supply, or when the fuel and air are not thoroughly mixed, and which will, by its extremely high heat, efi'ect re-ignition of the combustible mixture if combustion should be momentarily discontinued. c,

A bridge wall, 11, of fire clay or other refractory material, projects upwardly from the floor, 8, and is provided for the purpose of enabling an auxiliary supply of air to be admitted to the firebox, the air passing-through a central channel, ,11, in the bridge Wall, andbeing either drawn in directly fromthe atmosphere or forced inTlfly bridge wall becomes highly heated by the combustion in the firebox, and the entering air is preheated thereby in its traverse through the channel, 11. The bridge wall may either extend transversely in the firebox, as shown, or longitudinally, and may be of the full length permissible by the dimensions of the fire box or of less length, as preferred. The discharge opening of the channel, 11*, into the firebox, may extend either entirely or partially throughout the length of the bridge wall, and may be either continuous or divided into a separated discharge slots.

The impurities which are separated from plurality of 'the fuel by the intense heat of the flame at the locus of combustion impinge against the bafiie plate, 10, and are deposited by gravity on the floor, 8, from which theypass through an opening in the floor into a slag receptacle,

12, located below the floor, and are granulated by dropping into water, a supply of which is maintained in the receptacle. An opening, 11", is formed in the bridge wall, 11, at the bottom thereof, to permit the free traverse of the separated residuum along the floor to the slag receptacle.

It will be obvious to those familiar with the construction and operation of steam boiler furnaces or fireboxes, that a special feature of advantage of my invention, in addition to that 'of its capability of providing for the effective combustion of pulof combustion.

verized or fluid fuel, is found in its capacity by me May 25,1914, Ser'. No.

I claim as my invention and desire to se- Y cure by Letters Patent:

1. The combination with a furnace having a floor, of a plurality of fuel delivery conduits projecting diagonally upward and discharging toward a substantially central locus of combustion, a baffle plate orQdeflector supported above the plane of said locus of combustion, and a bridge Wall projecting upwardly from the floor substantially toward the locus of combustion and providing an auxiliary air supply for the fire-box.

2. The combination with a locomotive firebox having Water walls and a plurality of circulating tubes connecting front and rear walls, of means for delivering to said firebox a plurality of upwardly converging bodies or columns of combustible matter,

said bodies or columns meeting at a substantially central 'locus of combustion, and

a baflie supported on said tubes substantially centrally of the fire-box and over the locus ii. The combination with a furnace having a .floor, of means for' delivering a plurality of bodies or columns of combustible matter in the direction of a substantially central locus of combustion in the furnace, -means for deflecting the products of' combustion from said central locus of. combustion, and a bridge wall projecting upwardly from the floor substantially toward the locus of combustion and providing an auxiliary air supply for the fire-box.

4. The combination with a furnace having a floor, of means for delivering a plurality of bodles or columns of combustible matter in the direction of a substantially central locus" of combustion in the fire-box, a bafiie-- plate or deflector supported above the plane of said locus of combustion, and a brid e wall projecting upwardly from the floor su stantially toward the locus of combustion and providing an auxiliary air supply for the firebox.

5. The combination with a furnace having a floor, of means for delivering 'a plurality of bodies or columns of combustible matter in the direction of a substantially central iaw locus of combustion, a baflle-plate located matter in the direction of a substantially above the lane of said locus of combustion central locus of combustion, means for defor deflecting the products of combustion fleeting the products of combustion, and a from said locus, and a bridge Wall projecting bridge wall projecting upwardly from the 5 upwardly from the floor substantially tofloor substantlally toward the locus of com- 15 ward the locus of combustion and providing bustion.

an auxiliary air supply for the fire-box. VIRGINIUS Z. CARACRISTI.

6. The combination with a furnace hav- Witnesses: 1 ing a floor, of means for delivering a plu- A. V. ADAMSON,

10 rality of bodies or columns of combustlble H. M. MCCLAUGHRY. 

